Barnaby Joyce has resigned as Deputy Prime Minister and New England MP following the High Court decision that ruled he is illegible to sit in the parliament due to his New Zealand dual citizenship.

The electorate will now be forced into a by-election which will take place on December 2.

Mr Joyce has already indicated he will stand in the by-election, and is eligible to do so as he has formally renounced his dual citizenship.

The former deputy prime minister said he wasn’t surprised by the ruling on Friday afternoon saying he had a feeling.

“In my gut, I thought ‘this is the way it’s going to go.”

Prime Minister Malcolm Turnbull held a press conference shortly after the High Court decision. He will be sworn in as agricultural minister and minister of water and resources, following Joyce’s disqualification from parliament.

"I know Barnaby will be disappointed with the court case results, its as though he's been let of the stalls and his enthusiasm is un-containable. He has a passion for representation," Mr Turnbull said.

Senator Mitch Fifield will take over former Senator Fiona Nash’s portfolio of regional communication and Senator Darren Chester will take on regional development.

Senator Matt Canavan will be returned to the resources portfolio.

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EARLIER: Deputy Prime Minister Barnaby Joyce, along with six other politicians, will find out the future of their political careers.

The decision is expected to be handed down around 2.15pm.

Along with Mr Joyce, fellow Nationals MP Senator Matt Canavan, former Greens Senators Scott Ludlam and Larissa Waters and One Nation Senator Malcolm Roberts will also find out the outcome today.